Sleeping bag



FIG. 1 is a front elevational view of a sleeping bag design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front left perspective view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a right side elevational view thereof.

The broken line showing of the collar and zipper opening in FIGS. 1, 2,3, 4, and 5 is for illustrative purposes only, and forms no part of theclaimed design.

The ornamental design for a sleeping bag, as shown and described.